Get this SquareUp device for FREE by going to this website: https://squareup.com. Just know that you'll be paying a 3% fee on all charges, just like most businesses. So what are you waiting for? Get one for free and test it out!
I just ordered mine.
Just got a smartphone--the MyTouch 4G--read about it in the blog post above ^^
I'll be updating with a new blog post and "review" once the Square comes in :D